Re: Is the HF Band a Noise Wasteland?

John Larkin wrote:
On Sat, 26 Jan 2008 13:36:55 -0800 (PST), mpm <mpmillard@xxxxxxx>
wrote:

On Jan 26, 4:23?pm, John Larkin
<jjlar...@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Sat, 26 Jan 2008 10:59:19 -0800, D from BC





<myrealaddr...@xxxxxxxxx> wrote:
I was reading on
http://en.wikipedia.org/wiki/High_frequency
The HF band is from 3Mhz to 30Mhz.
(The upper f of AM radio is ~1.6Mhz)
This band is used by CB radio operators and amateur radio operators.
Anybody here just think:
"Put the EMI here! It's ok." :P
So some truckers get some static.
HF Radio amateurs can use the internet.
(Who wants to wait for sunspots to go away?)
Has the HF band become the 'garbage dump' of the airwaves?
It always was. Stuff below 50 MHz gets reflected by the ionosphere, so
at HF frequencies the whole world is in one noisy tin can. Natural
atmospheric noise, lightning and such, is trapped too. That's why it's
not worth designing an HF receiver with an especially good noise
figure.


If you must live with small antennas you have to. One reason my EMC kit has a LNA.


John- Hide quoted text -

- Show quoted text -
Thank god for noise blanker circuits....

Speaking of spectrum wastelands.... the petition to reallocate TV
Channel-6 to the FM band is back on the horizon. This time to include
TV-5 as well. (USA)

It would add substantially to the FM broadcast band, which is
congested in most urban areas.
And very few TV stations have elected 5/6 as their terrestrial DTV
channel.
Perhaps the time has finally come?


And we all by new car radios? Nah.

-mpm


Do we need 15 more soft rock stations, or three more places to hear
Prarie Home Companion?


Could use a few more country stations with the old stuff. And I want Wolfman Jack back!

--
Regards, Joerg

http://www.analogconsultants.com/
.

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